5D91C 05XJ28 5XJ28. 6GTPY 06GTPY 24W5KP. Precision 5540 Precision M5510 Precision M5520. Precision 5520 Precision 5530 Precision 5530 Xeon E-2176M. Battery Type : Li-ion. 1.Li-Ion Laptop Battery 10.8V and 11.1V are in common use.
eBay